Paper receptacle



c. 0. BALL 2,478,360

PAPER RECEPTACLE Filed May 19, 1945 v Patented Aug. 9, 1949 PAPER RECEPTACLE Charles 0.

Ball, Maumee, Ohio, asslgnor to Owens-Illinois Glass Company, a corporation of Ohio Application May 19, 1945, Serial No. 594,696

Claims. (01. zza-ss),

My invention relates to articles made from blanks of paper or other sheet material adapted to be folded along fold lines or score lines of predetermined pattern formed in the blanks, for shaping the article. The invention provides an article having a rectangular body with a closed end and, in the form herein illustrated, may be used as a container for milk or other liquids.

An object of the invention is to provide an improved form of receptacle having a rectangularbody and a bottom end folded from a single sheet of material designed to provide a bottom which is practically invulnerable to leakage. For this purpose the bottom end of the receptacle is designed to avoid a thickness of more than three layers or plies of the folded material.

A further object of the invention is to provide a blank giving efficient use of the material, permitting the blanks to be cut from the strip of stock with very little waste of the material.

A still further object of the invention is to provide a novel container of the character indicated in which there are no joints in the bottom corners and no out edges extending to any of the corners.

The panels 8, 9, I 0, and H have bottom-forming extensions or sections I5, I6, I1, and I8, fold- Other objects of the invention will appear hereinafter.

Referring to the accompanying drawings:

Fig. 1 is a plan view of a flat blank of sheet material cut and scored for folding to form a rectangular receptacle embodying my invention.

Fig. 2 is a perspective view on a larger scale, of the receptacle in an inverted position, the bottom end being shown partly folded.

Fig. 3 is a horizontal cross section of the receptacle giving a plan view of the inner surface of the folded bottom.

Fig. 4 is a fragmentary view of a detail showing a modified construction.

Referring to Fig. 1, the blank is cut from a strip of paper or other sheet material and is provided with fold lines, indicated on the drawing by broken lines, along which the blank is folded for shaping the article. The fold lines may consist of score lines, creases, or weakened lines. The blank is adapted to be folded along parallel fold lines 4, 5, 6, and I, to form the rectangular body of the receptacle, said body comprising panels or able inwardly along the score line I3 after the body has been formed, to shape the bottom of the container. These extensions are not separated by lines of cleavage, the adjoining edges of the extensions being united along the fold lines 4, 5 and 6 which are extended downward through the bottom-forming portion of the blank.

The outline of the bottom-forming portion of the blank is defined by lines extending between the points V, W, A, B, C, D, E, F, G, H, I, L, M, and Q. The score line I3 intersects the corner score lines 4, 5, 6, and I respectively, at the points R, S, T, and U. The extension I6 is divided into a major section I6 and triangular sections I6= and l6 by diagonal score lines SI, JR and slits JK, KL, the latter being an extension of the score line t. The rectangular extension of the section It, boundedby lines JKLI, may be removed if desired by severing along an extension of the score line RJ. The end extension I8 is also divided into a majorsection l8 and triangular sec-' tions I8 and I8 by means of diagonal score lines TD and CU.

The side seam strip H is extended downward below the marginal line I3, providing an extension I! having an outer edge VW inclined diagonally downward and outward below the fold line I3. The extension l4 is thus formed with a triangular enlargement having a diagonal side VW and a horizontal base in the line WA. The width of the extensions I5, I6, and I8 as shown, is half the width of the narrow panels 9 and II. The section I1 is extended to a greater width, the extended portion being defined by the lines El PG and GH,

The blank is folded to form the receptacle by first folding along the lines 4, 5, 6, and 1 to form the rectangular receptacle body, the seam strip I4 being then adhered to the inner face of the panel 8. With the blank thus folded, the extension I4 of the seam strip I l overlaps the end section I5, the diagonal edges VW and QM being parallel. The seam is thus carried into the bottom-forming portion of-the blank and extends entirely across the section I5.

The bottom-forming portion of theblank, comprising the sections I5, IE, IT and I8, is then folded inwardly to form the bottom. The sec-- tions l5 and I8 when folded inwardly to horizontal position form a portion of the inner surface of the bottom as seen in Fig. 3. As the section I8 folds inwardly the triangular sections I8 and I8 are simultaneously folded back over the section 3 l8 and form an intermediate layer of the container bottom. The section it as it is folded inwardly is brought over the section i8. so that the extension it of the seam strip, except that portion thereof which is overlapped by and adhered to the section II, overlies the section it. The triangular section II is thus interposed between the sections i8' and it. The section I! folds over the section i5 and thereby forms the outermost layer of said bottom, the major portion of the bottom surface being formed by the section II, and the remaining portion by the section it, except a small triangular corner where the section i5 is cut away and exposes a portion of the underlying section it. The section I6 folds inwardly in substantially the same manner as above described in connection with the section it, the section I 6 being folded in between the section it and the section ii. The triangular section i6 is folded in to lie between the section l6 and the section IS. The section i6 which forms a part of the innermost layer of the receptacle bottom is of generally triangular form with a rectangular extension defined by the lines JK, KL and LI. When the fold lines 4, 5, 6, and 'l are equally spaced or approximately equally spaced to form a substantially square receptacle body, the modified form of side seam extension shown in Fig, 4 may be used. This extension M difiers from the extension Hi (Fig. 1) by having the outer triangular corner removed along a line b parallel with the line AB, thereby shortening the diagonally outwardly inclined edge so that the line b passes through the apex of the triangle i8 (Fig. 3) when the blank is folded. This prevents the side seam extension being carried beyond the center of the folded bottom and thus prevents a four-ply thickness.

In the folded bottom, butt joints are formed as follows:

' The sections i l and i8 form a butt joint at their meeting edges AW and ED. The edge LM of the section i5 makes a butt joint with the edge HI of the section iii. A butt joint offset by the thickness of the interposed section I4, is formed by the edge BC of triangle iii and the edge FG of the section H. A butt joint, offset by the interposed section i5, is likewise formed by the edge JK of the section iii and the edge FG of the section IT.

The juxtapositioned parts or layers of the folded blank are secured in position in any approved manner by an adhesive or bonding material.

Modifications may be resorted to within the spirit and scope of my invention.

I claim:

1. A fiat blank of foldable sheet material shaped and provided with weakened fold lines adapting it to be folded to form a receptacle having a rectangular body and a closed bottom end, said blank having parallel fold lines defining four panels which form the body of the receptacle, each two alternate panels being of equal width, the blank including a body seam strip in addition to said panels and extending along one edge of the blank between said edge and a said fold line, said blank having a bottom margin fold line extending throughout the length of the blank in a direction perpendicular to said parallel lines and separating the body-forming portion of the blank from a bottom-forming strip, said parallel lines extending through said bottom-forming portion and dividing it into sections individual to the panels and foldable inwardly along said bottom line for forming the bottom, said seam strip being extended through said bottom-forming portion and having an outer edge extending diagonally downward and outward from the end of said bottom fold line. providing an extension positioned and arranged to overlap the opposite end of the bottom-forming portion of the blank when the blank is folded, the end edges of said bottom-forming strip being parallel, whereby the body seam is carried into said bottom at one corner thereof and across a portion of said bottom in a diagonal direction.

2. A blank of foldable sheet material shaped and provided with weakened fold lines adapting it to be folded to form a receptacle having a rectangular body and a closed bottom end, said blank having parallel fold lines defining the panels which form the body of the receptacle, the blank including a body seam strip extending along one edge of the blank between said edge and a said fold line, said blank having a bottom margin fold line extending throughout the length of the blank in a direction perpendicular to said parallel lines and separating the body-forming portion of the blank from a bottom-forming strip, said parallel lines extending through said bottom-forming portion and dividing it into sections individual to the panels and foldable inwardly along said bottom line for forming the bottom, said seam strip being extended through said bottom-forming portion and having an outer edge inclined diagonally downward and outward below said bottom fold line, providing an extension positioned and arranged to overlap the opposite end of the bottomforming portion of the blank when the blank is folded, thereby carrying the body seam into and across a portion of said bottom in a diagonal direction, said parallel fold lines being spaced to provide comparatively narrow panels alternating with wider panels, the said bottom-forming strip having a triangular corner portion thereof cut away at the end of the strip opposite said side seam strip extension whereby the sides of the seam portion which is carried into the said bottom are substantially parallel.

3. A blank of foldable sheet material shaped and provided with weakened fold lines adapting it to be folded to form a receptacle having a rectangular body and a closed bottom end, said blank having parallel fold lines defining the panels which form the body of the receptacle, the blank including a body seam strip extending along one edge of the blank between said edge and a said fold line, said blank having a bottom margin fold line extending throughout the length of the blank in a direction perpendicular to said parallel lines and separating the body-forming portion of the blank from a bottom-forming strip, said parallel lines extending through said bottomforming portion and dividing it into sections individual to the panels and foldable inwardly along said bottom line for forming the bottom, said seam strip being extended through said bottomforming portion and having an outer edge inclined diagonally downward and outward below said bottom fold line, providing an extension positioned and arranged to overlap the opposite end of the bottom-forming portion of the blank when the blank is folded, thereby carrying the body seam into and across a portion of said bottom in a diagonal direction, said parallel fold lines being spaced to provide comparatively narrow panels alternating with wider panels, the said bottomforming strip having a triangular corner portion said side seam strip extension whereby the sides of the seam portion which is carried into the said bottom are substantially parallel, the extensions of the narrow panels and of one said wider panel being of equal width or extent in the direction lengthwise of the panels, said width being substantially one half the width of a said wider panel. and the remaining flap extension being of greater width to provide an extension which in the folded bottom overlaps the opposite flap.

4:. A receptacle having a rectangular body and an integral closed end, said receptacle consisting of the one-piece blank set forth in claim 1, folded to form the said receptacle and having the superposed portions of the folded blank adhered together by an adhesive material.

5. A receptacle having a rectangular body and REFERENCES crrEn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 329,661 Lorenz et a1. Nov. 3, 1885 348,547 Crump Sept. 7, 1886 1,147,652 Scudder July .20, 1915 2,390,909 Zinn, Jr. Dec. 11, 1945 

